逻辑数据模型中实体之间的关系是通过外键来表示的，外键与引用实体的主键相关联。
Relationships between entities in the logical data model are represented through foreign keys that are associated to the primary keys of the referring entity.
正如ThomasErl所推荐的，使用公共数据模型，这个能力跟“公共实体”实现能力紧密地关联到了一起。
Just as Thomas Erl recommends using a common data model, this capability is closely related to the "common Entities" Implementation capability.
CodeFirst编程模型通过编写类代码来创建模型，与该类关联的实体则包含在模型当中。
The code First programming model is a way of creating a model by writing the code for the classes whose associated entities are contained by the model.
因为数据库不支持与实体相关联的行为，领域模型最终只具有简单的变量以及相关的getter和setter方法。
Because databases do not support behavior associated with entities, the domain model ended up having simple variables with getter and setter methods for them.
它是SimpleRDB的通用模型的第一个类实体，但是在UML 2.0中没有它的对等体。这就是关联的签名没有与uml元素相关的形式参数的原因。
It is a first class entity in the meta-model of SimpleRDB, but it has no equivalent in UML 2.0. That is why the signature of the relation has no formal parameter that relates a UML element.
但是，若要为与其他类型存在关联的实体类型定义一个MEST模型，则必须为对象图中的每个类型实现MEST。
However, to define a MEST model for entity types that do have associations with other types, you must implement MEST for each type in the object graph.
实体类型可以定义在数据模型中表示关联的导航属性。
Entity types can define navigation properties that represent associations in the data model.
某些编程模型特征具有可以查看的关联实体，如类型库和元数据。
Some programming model characteristics have associated entities that you can view, such as type libraries and metadata.
当使用的实体类型与其他类型没有关联时，定义一个MEST模型很简单。
When you are working with entity types that do not have associations to other types, defining a MEST model is straightforward.
您可以将概念模型中描述的实体和关联视为应用程序中的抽象物件和关联。
Entities and relationships described in a conceptual model can be thought of as abstractions of objects and associations in an application.
语义关联是语义数据模型中实体之间二维关系的知识表示形式。
Semantic association is defined as the representation of rich knowledge about binary relation in semantic data model.
该文分析了递阶结构表达方式的不足，利用扩展的实体关联(eer)表达方式建立了产品的数据模型，并以油泵产品为例建立了产品数据模型的展开结构。
In this paper, we analyze the shortcomings of hierarchical structure, and build product model with extended entity relationship (EER) approach. A product model of fuel pump is shown as an example.
该文分析了递阶结构表达方式的不足，利用扩展的实体关联(eer)表达方式建立了产品的数据模型，并以油泵产品为例建立了产品数据模型的展开结构。
In this paper, we analyze the shortcomings of hierarchical structure, and build product model with extended entity relationship (EER) approach. A product model of fuel pump is shown as an example.
应用推荐